Year	Number of Firms
1997-01-01	9
2002-01-01	9
2003-01-01	8
2004-01-01	11
2005-01-01	15
2006-01-01	15
2007-01-01	18
2008-01-01	21
2009-01-01	15
2010-01-01	18
2011-01-01	19
2012-01-01	24
2013-01-01	20
2014-01-01	19
2015-01-01	23
2016-01-01	22